He hasn't mentioned anything about braking, only heavy steering and a noise, I think he should check steering pump for... 1 Fluid level, 2 leakage and 3 as you suggested drive belt. I has this problem and it was a "tired" pump and it groaned when under pressure, if the brakes were making that much noise I would be worried about even driving the thing! I can't see why the brake caliper sliders would make a noise when turning the steering, the whole lot turns with the wheel!